James at 2011-02-25 18:32:59:
Example of saying "I love you" without saying it.
Han Solo Carbonite Freezing scene.
http://www.youtube.com/watch?v=nIVDepX8JvQ
While Leia says I love you, Han's response is perfect. It's the only way his character could say "I love you" as well.
In addition, I linked to the whole scene because the business with Chewy is also Han's way of showing he loves Leia. He stops Chewy from going ape-shit when they're about to freeze his master so that Chewy will be there to protect Leia.
That and John Williams music cues / swell is just awesome as well :)